CVE-2026-97505

Summary

In the Linux kernel, the following vulnerability has been resolved:

PCI/sysfs: Add CAP_SYS_ADMIN check to __resource_resize_store()

Currently, the __resource_resize_store() allows writing to the resourceN_resize sysfs attribute to change a BAR's size without checking for capabilities, currently relying only on the file access check.

Resizing a BAR modifies PCI device configuration and can disrupt active drivers. After the upcoming conversion to static attributes, it will also trigger resource file updates via sysfs_update_groups().

Add a CAP_SYS_ADMIN check to prevent unprivileged users from performing BAR resize operations.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b722a607f858b9cd036075ea0efad553fb98e982affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cbf0628c0b7db86c5ce36451f088101546acbf1daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 25ec7f57deceec633f27bc93b615f951e2ade814affected
LinuxLinux0 < 6.12.111affected
LinuxLinux0 < 6.18.53affected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References